In a sign of the times, the U.S. Customs and Border Patrol agency issued a proposal to ask certain foreign visitors for their social media handles when entering or exiting the country.

The proposed change would add the question: “Please enter information associated with your online presence — Provider/Platform — Social media identifier” to the I-94 and I-94W forms filled out by foreigners arriving and leaving the country without a visa.

Account handles in question are on platforms such as Facebook, Twitter and Instagram.

Currently, foreigners from 38 countries can enter the United States without a visa and stay a maximum of 90 days before needing one.

The proposal states the question would be optional on the form, though the information would be used for vetting purposes.